Al Pastor Burritos in San Gabriel Valley?
There's a taco truck called Tacos Las Donas that's parked at a smog check place (across from McDonalds and a 76 gas station) on Rosemead and Duarte. Their al pastor is one of my favorites off their meat selection so I'd recommend checking them out! I think their hours are something like 7pm-2am, Tues-Sunday.
You missed my favorite Esquicitos Tacos, they are now closed (altho they still do their catering via taco cart), but I think that La Estrella (several locations in Pasadena) do a mighty fine version (was my go-to before Esquicitos). You will find ciomments about which location is best here on CH, but personally, they all seem the same to me.
La Estrella Restaurant
330 E Orange Grove Blvd, Pasadena, CA 91104